Just found this photo on eBay. It shows an Ohio Tuec (one of my favorites!) with an early Edison bulb at the top of the handle yoke. If Ohio offered this as an option, they were 10 years ahead of Hoover! Hard to say whether this was a Rube Goldberg or something the factory actually offered. Any thoughts?
http://www.mmgcollectibles.com/images/M/MJ/MJ742f.jpg
http://www.mmgcollectibles.com/images/M/MJ/MJ742f.jpg